Decommissioning Exchange server from EV

We recently migrated to Exchange 2010 from 2007 and we are to the point of decommissioning our old Exchange 2007 server as all mailboxes have been migrated to 2010 server. I have been following the instructions listed here http://www.symantec.com/business/support/index?page=content&id=TECH50256 however when running the SQL queries to determine if any mailboxes are still active on the old Exchange server its showing there are 170.

All the mailboxes have been migrated to the new server. When I go to the synchronization tab of the Exchange mailbox archiving task for the new server or old server and try doing selected mailboxes it show no mailboxes available. What am I missing? How do I get these mailbox archives to point at the new server so I can remove the old.

I found the following article - http://www.symantec.com/business/support/index?page=content&id=TECH53096 which talked about how to remove the mailboxes from EV that no longer have a provisioning group. After figuring out what mailboxes were orphaned I went into the DB and removed them. I can't however answer whether or not you'll still be able to access the archives because most of my users mailboxes aren't archived and all that I deleted contained no items. I think you will be able to though as the archives (though they contain nothing) still show up. Don't quote me on that though.

I did run the provisioning task and sync process but with no change. After doing some more digging I looked at the provisioning task report and server event logs. I found a couple of issues. First was the throttling script was run but not on the right user. Minor mistake but one that was fixed.

The next thing found was that there was no target(s) set for any of the provisioning groups. Not sure how the targets got removed but at any rate I added back in the Exchange organization and re-ran the provision task and sync process. After doing that the list of users shrunk down to 32 from the 170 that were on the old originally. I did some more verification and it appears that all the remaining users were old users that no longer exist in AD.